100M Signal Levels - Page 4

jb66 · 10-09-2011, 19:44

Cold metal has less attenuation, I always get upstream power level issues in summer

a 4 way splitter looses 7db so your downstream will rise to -3 with a 4 way splitter

RB2004 · 10-09-2011, 21:44

Quote:

Originally Posted by jb66

Cold metal has less attenuation, I always get upstream power level issues in summer

a 4 way splitter looses 7db so your downstream will rise to -3 with a 4 way splitter

is that ideal? or still considered borderline? as the range Im not sure if it is -6 or -3 on the bottom end.

General Maximus · 10-09-2011, 21:53

-3 is cool, -6/7 is a bit dodgy

jb66 · 10-09-2011, 22:08

Borderline, I'd settle for that if your upstream is good (which it is) and your snr is fine.

RB2004 · 10-09-2011, 22:15

Hi, I will see what the signal is like then after ive made the changes.

if its still borderline, and likely to fluctuate down to -4

then i might be inclined to fit a HDU anyway to give peace of mind that the problem is properly resolved. Better to have a stronger signal and attenuate it. But I will see what happens, and feed back.

jb66 · 10-09-2011, 23:21

I wouldnt attenuate at all, but if you really had to you'd be better with a 4db equaliser

RB2004 · 11-09-2011, 00:01

Quote:

Originally Posted by jb66

I wouldnt attenuate at all, but if you really had to you'd be better with a 4db equaliser

it shouldnt need attenuating should it?

if the 4 way splitter looses 7db, and I end up with -3

the HDU would give me 4db which is about as near to perfect as it will get, well within spec then.

RB2004 · 15-09-2011, 12:22

Engineer number 3 came today, did more than the previous 2.. checked out my signal levels on the modem, V+ box, isolator, omni, and in the pit.. then said that there was a problem and he called networks.

Networks have just been, and sorted it,

by the time I get a 4 way splitter fitted to eliminate the 2 way splitter, I should have a perfect signal level of around 0 dBmV

modem levels are now,

Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM256 194 55616000 Kbits/sec 299000000 Hz -2.1 dBmV 41.0 dB Hybrid
Locked QAM256 193 55616000 Kbits/sec 291000000 Hz -1.7 dBmV 40.4 dB Hybrid
Locked QAM256 195 55616000 Kbits/sec 307000000 Hz -1.9 dBmV 41.0 dB Hybrid
Locked QAM256 196 55616000 Kbits/sec 315000000 Hz -2.1 dBmV 40.8 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown

--------------------------------------------------------------------------------

Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 1 20480 Kbits/sec 35800000 Hz 44.5 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

and V+ box is -8 dBmV, -5 dBmV upstairs without the 2 way splitter.

So now im wondering if the previous 2 engineers were just giving me rubbish about calling networks, as they was supposed to of been down twice previously and didnt make this fix, so now im going to persue a complaint, why 2 engineers, and 2 "supposed" networks visits could not fix this problem and I was given rubbish about my signal levels being fine and nothing could be done.

When this engineer managed to get it fixed, with 1 call to networks and spent a lot more time investigating the problem.

General Maximus · 15-09-2011, 13:06

nice one dude. I wouldn't mind things going wrong if they acknowledged the fault and fixed it when you brought it to their attention. The things which pees everyone off is the rubbish they try to fob you off with and send you round in circles.

Kudos to the engineer that came out and fixed it

RB2004 · 15-09-2011, 20:51

yep, agreed, I was annoyed by the 2 engineers who did nothing and told me it was all fine.

couldnt admit there was a problem just kept telling me its fine.

colbeck · 15-09-2011, 22:42

where do you live ?? may be able to help by getting hold of the AFM and may be able to put in a word if that would help.
Thank you Colbeck

RB2004 · 15-09-2011, 23:22

Quote:

Originally Posted by colbeck

where do you live ?? may be able to help by getting hold of the AFM and may be able to put in a word if that would help.
Thank you Colbeck

Hi, im from the south east, essex/thurrock area.

I think the local depot that serves where I live is basildon.

if you are able to, that would be great thanks.

Because I would like to persue some kind of complaint, really not very happy about it.. feel lied to and fobbed off which as a customer who pays nearly Â£1400 a year i dont feel is acceptable.

I know ive said it all already previously in this thread...but like I said first engineer, turned up.. did nothing then said nothing he could do and that he would get networks down regarding a corroded line tap in the pit.

I have no way to know if networks were even called let alone came down... but nothing changed regarding the signals.

then engineer number 2 came down, laughed and made a remark bless their cottom socks when I said that I thought ideal was nearest to 0 you can get.. then he told me -7 dBmV was acceptable, and with -6 dBmV it was fine.. no problems at all... checked the pit, said i was only person on the tap... but again said he would get networks down within 4 hours to take a look for any problems as to why I was getting erratic speeds.

4 hours came and gone, so again have no idea if networks were even called, all I know is again nothing was done.

Then the 100mbit team even though they acknowledged -6 was borderline. Although after I realised it was actually -3 considered borderline which is worse still. Because 2 engineers had been down they just said its working, no problems at all.. I see -6 dBmV all the time.. and wouldnt send any more engineers.

So I decided to phone up and report a fault with my TV (blocky picture) so they sent todays engineer down, and I was actually really pleased.. he checked the signal levels on the V+ box, then the modem... then checked them at the isolator... then the omni, before checking them at the pit.. really spent time tracing the problem backwards... then a while later he said that he had spoken with networks and there is definitely a problem... within an hour id guess, networks came down.. actually saw the guy this time, he spent about 5 minutes doing something... then knocked on our door to say the problem was fixed... and when I checked now I have quite reasonable signal levels.

Therefore what im questioning now is... WHY didnt those 2 previous engineers do what this engineer today did? why so quick to say its fine, nothings wrong and leave... AND did they actually call networks? because if they did, the question I have is why did 2 networks team visits to that pit not resolve the problem? or even spot the problem? was only when networks guy number 3 come along.. problem solved within minutes... to me it looks like they wasnt even called out.